Results 61 to 70 of about 51,217 (241)

The Effects of Multiple Companions on the Efficiency of the SIM Planet Searches

, 2005
The Space Interferometry Mission (SIM) is expected to make precise astrometric measurements that can be used to detect low mass planets around nearby stars.
Ford, Eric B.
core   +2 more sources

The PHASES Differential Astrometry Data Archive. III. Limits to Tertiary Companions [PDF]

, 2010
The Palomar High-precision Astrometric Search for Exoplanet Systems (PHASES) monitored 51 subarcsecond binary systems to evaluate whether tertiary companions as small as Jovian planets orbited either the primary or secondary stars, perturbing their ...
Benjamin F. Lane, Bernard F. Burke, Bevington, Boss, Colavita, Cumming, Duquennoy, Dvorak, Fischer, Gonzalez, Griffin, Hatzes, Holman, Howard, Johnson, Kirkpatrick, Lane, M. M. Colavita, M. Shao, Maciej Konacki, Marzari, Marzari, Mason, Mason, Matthew W. Muterspaugh, Muterspaugh, Muterspaugh, Muterspaugh, Muterspaugh, Muterspaugh, Muterspaugh, Muterspaugh, Pfahl, Pfahl, Queloz, Raghavan, S. R. Kulkarni, Shao, Söderhjelm, Tamazian, Traub, Traub, Wright   +42 more
core   +3 more sources

Astrometric-Spectroscopic Determination of the Absolute Masses of the HgMn Binary Star φ Herculis [PDF]

The Astronomical Journal, 2007
The Mercury-Manganese star Phi Her is a well known spectroscopic binary that has been the subject of a recent study by Zavala et al. (2006), in which they resolved the companion using long-baseline interferometry. The total mass of the binary is now fairly well established, but the combination of the spectroscopy with the astrometry has not resulted in
openaire   +2 more sources

Astrometric detection of a Neptune-mass candidate planet in the nearest M-dwarf binary system GJ65 with VLTI/GRAVITY [PDF]

Astronomy & Astrophysics
The detection of low-mass planets orbiting the nearest stars is a central stake of exoplanetary science, as they can be directly characterized much more easily than their distant counterparts.
G. Collaboration, R.Abuter, A.Amorim, M.Benisty, J-P.Berger, H.Bonnet, G.Bourdarot, P.Bourget, W.Brandner, Y.Cl'enet, R.Davies, F.Delplancke-Strobele, R.Dembet, A.Drescher, A.Eckart, F.Eisenhauer, H.Feuchtgruber, G.Finger, N.M.Forster-Schreiber, P.Garcia, R.Garcia-Lopez, F.Gao, E.Gendron, R.Genzel, S.Gillessen, M.Hartl, X.Haubois, F.Haussmann, T.Henning, S.Hippler, M.Horrobin, L.Jochum, L.Jocou, A.Kaufer, P.Kervella, S.Lacour, V.Lapeyrere, J. L. Bouquin, C.Ledoux, P.L'ena, D.Lutz, F.Mang, A.M'erand, N.More, M.Nowak, T.Ott, T.Paumard, K.Perraut, G.Perrin, O.Pfuhl, S.Rabien, D. Ribeiro, M. Bordoni, J.Shangguan, T.Shimizu, J.Stadler, O.Straub, C.Straubmeier, E.Sturm, L. Tacconi, K. Tristram, F.Vincent, S. Fellenberg, F.Widmann, E.Wieprecht, J.Woillez, S.Yazici, G.Zins   +67 more
semanticscholar   +1 more source

The Evolution of Wide Binary Stars

, 2009
We study the orbital evolution of wide binary stars in the solar neighborhood due to gravitational perturbations from passing stars. We include the effects of the Galactic tidal field and continue to follow the stars after they become unbound. For a wide
Ambartsumian, Bahcall, Bahcall, Belokurov, Binney, Chanamé, Chanamé, Chandrasekhar, Dehnen, Ernst, Fukushige, Grillmair, Heggie, Heggie, Heggie, Heisler, Hut, Hénon, King, Kroupa, Küpper, Latham, Lépine, Mallada, Odenkirchen, Palasi, Poveda, Quinn, Retterer, Scott Tremaine, Sesar, Shen, Stiefel, Vokrouhlický, Wasserman, Wasserman, Weinberg, Yabushita, Yan-Fei Jiang, Yoo, Öpik, Öpik   +41 more
core   +1 more source

Tracing the young massive high-eccentricity binary system Theta 1 Orionis C through periastron passage [PDF]

, 2009
The nearby high-mass star binary system Theta 1 Orionis C is the brightest and most massive of the Trapezium OB stars at the core of the Orion Nebula Cluster, and it represents a perfect laboratory to determine the fundamental parameters of young hot ...
Baize, Baldwin, Bessell, Conti, D. Schertl, Demircan, Docobo, G. Weigelt, Genzel, Gómez, Herbig, Hillenbrand, Hirota, Hofmann, Hofmann, J. A. Docobo, Jeffries, K. Ohnaka, K.-H. Hofmann, Kratter, Kraus, Kraus, Kraus, Labeyrie, Lohmann, M. Schöller, M. Smith, Martins, Mason, Mathieu, McCaughrean, Menten, Morrell, Mozurkewich, O'Dell, Patience, Petrov, Polyakov, Pourbaix, R. Petrov, Rodríguez, Rubin, S. Kraus, Sandstrom, Schertl, Simón-Díaz, Stahl, Stahl, Stassun, Struve, T. Driebe, T. Preibisch, Tan, Tatulli, V. S. Tamazian, Vacca, Vitrichenko, Weigelt, Weigelt, Weigelt, Y. Y. Balega, Zinnecker   +61 more
core   +2 more sources

Radial Velocity Monitoring and Analysis of Gaia Astrometry of Selected Intermediate Mass Stars to Constrain Their Multiplicity Status

Astronomische Nachrichten, Volume 347, Issue 1, January 2026.
ABSTRACT We present new radial velocity measurements of 13 selected intermediate mass stars (2–6 M⊙). The measurements were performed between 29 April and 6 September 2024 at the University Observatory Jena using the échelle spectrograph FLECHAS. The radial velocity of eight stars was found to be constant during our spectroscopic monitoring, namely: 17
J. Bätz, M. Mugrauer, K.‐U. Michel, J. Reichert, A. Tschirschky, L. Pietsch, F. Edelmann, R. Neuhäuser   +7 more
wiley   +1 more source

Uncertainties in Historic Visual Double Star Measures—III Accurate Calibration Pairs

Astronomische Nachrichten, Volume 346, Issue 10, December 2025.
ABSTRACT Based on space‐based positions and proper motions, we present accurate rectilinear elements for 857 double star pairs over the celestial sphere. These elements allow for the computation of precision ephemeris Position Angles and Separations of these pairs.
Roderick R. Letchford, Graeme L. White
wiley   +1 more source

A Search for Stellar-Mass Black Holes via Astrometric Microlensing

, 2016
While dozens of stellar mass black holes have been discovered in binary systems, isolated black holes have eluded detection. Their presence can be inferred when they lens light from a background star.
Kozlowski, S., Lu, J. R., Ofek, E. O., Sinukoff, E., Udalski, A.   +4 more
core   +1 more source

OGLE-2005-BLG-071Lb, the Most Massive M-Dwarf Planetary Companion? [PDF]

, 2009
We combine all available information to constrain the nature of OGLE-2005-BLG-071Lb, the second planet discovered by microlensing and the first in a high-magnification event.
Abe, F., Albrow, M. D., Anderson, Jay, Beaulieu, J. P., Bennett, D. P., Bode, M., Bond, I. A., Bramich, D. M., Brillant, S., Britton, T. R., Burgdorf, M., Calitz, H., Cassan, A., Christie, G. W., Cook, K. H., Coutures, Ch., DePoy, D. L., Dieters, S., Donatowicz, J., Dong, Subo, Doublier, Vanessa, Foellmi, Cedric, Fouqué, P., Fox, D. B., Gal-Yam, A., Gaudi, B. S., Gilmore, A. C., Gould, Andrew, Greenhill, J., Han, C., Hearnshaw, J. B., Hill, K., Hoffman, M., Horne, K., Itow, Y., Jaroszyński, M., Jørgensen, U. G., Kamiya, K., Kane, S., Kilmartin, P. M., Korpela, A., Kubas, D., Kubiak, M., Lépine, S., Marquette, J. B., Martin, Roland, Masuda, K., Matsubara, Y., McCormick, J., Meintjes, P., Menzies, J., Motomura, M., Muraki, Y., Nakamura, S., Ofek, E., Ohnishi, K., Okada, C., Park, B.-G., Pietrzyński, G., Pogge, R. W., Pollard, K. R., Prester, D. Dominis, Rattenbury, N., Sahu, K. C., Saito, To., Sako, T., Sasaki, M., Snodgrass, C., Soszyński, I., Steele, I., Sullivan, D., Sumi, T., Szewczyk, O., Szymański, M. K., The MOA Collaboration,, The OGLE Collaboration,, The PLANET/Robo Net Collaborations,, The ΜFUN Collaboration,, Tristram, P. J., Udalski, Andrzej, Ulaczyk, K., Vinter, C., Wambsganss, J., Williams, A., Wyrzykowski, Ł., Yanagisawa, T., Yock, P. C. M., Yoshoika, T.   +87 more
core   +5 more sources